Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7178609 | Window mill and drill bit | Daniel R. Hart, Calvin J. Stowe, II, Trung Huynh, Roy Swanson, Rustom K. Mody +3 more | 2007-02-20 |
| 7000715 | Rotary drill bits exhibiting cutting element placement for optimizing bit torque and cutter life | Christopher C. Beuershausen, Mark W. Dykstra, Roger Fincher, Roland Illerhaus, Rudolf Carl Pessier | 2006-02-21 |
| 5957225 | Drilling assembly and method of drilling for unstable and depleted formations | — | 1999-09-28 |
| 5402856 | Anti-whirl underreamer | Tommy M. Warren | 1995-04-04 |
| 4815342 | Method for modeling and building drill bits | James F. Brett, Tommy M. Warren | 1989-03-28 |